Improvement in adjustable stools



A. D0 LL.

AdjustahlaStools Patented- July 29,1873.

mfnesses.

UNITED STATES PATENT CEEICE.

ARNOLD DOLL, OF CLEVELAND, OHIO.

IMPROVEMENT vIN ADJUSTABLE STOOLS.

Specification forming part of Letters Patent No. 141,208, dated July 29,1873; application filed February 3, 1873.

To all whom it may concern:

Be it known that I, ARNOLD DOLL, of Cleveland, in the county ot'Cuyahoga and State of Ohio, have invented a certain new and lmprovedAdjustable Stool 5' and do hereby declare that the following is afnll,clear, and complete description thereof, reference being had to theaccompanying drawings making part of the same.

Figure l. is a side view of the stool. 2 is a vertical transversesection.

Like letters of reference refer to like parts in the several views.

This invention has for its object the construction of a stool so thatthe seat thereof can be raised or lowered, in order to accommodate it tothe height and convenience ot' those using it.

The construction and manner of operating said stool are as follows lnthe drawing, A represents the base or legs of the stool, from whichprojects upward a hollow standard, B. In said standard is titted, so asto slide therein, a tube, O, Fig. 2, to the upper end of which issecured the seat D of the stool. E, Fig. 2., is a circular plate ittedloosely to the outside of the tube, and which slides thereon. A collar,F, secured to the plate serves as a guide, and prevents the plate fromcramping on the tube. Pivoted in the tube O is a pawl, G, which is soarranged as to engage a rack, H. Said rack is secured to the side ot'the standard, and, in order that the pawl may engage therewith, a slotis made in the side of the tube, in which the pawl is pivoted, so thatthe teethof the rack will project therein so far as the inside ot' thetube, as shown in Fig. 2. Said pawl is attached to the plate E by meansof a link, I, and whereby it is disengaged from the rack, for elevatingand lowering the seat ofthe stool, as follows:

The seat of the stool, as represented in the drawing, is lowered so faras can be. In or- Fig.

der to raise it, the two hands are laid on the seat, one on each side,and in such way as to bring the thumbs on the cushion and the lingersunder the seat and upon the plate. Now, on lifting it' upward, the seatwill thereby be raised,in consequence of the withdrawal of the tube fromthe standard, the pawl at the same time slipping over the rack, andwhich holds the seat, when raised, by its engagement therewith on theremoval of the hands. The weight ofthe seat, by its connection with thepawl, throws its pointinto the'rack, as shown, by pressing dowward itsopposite end, thereby causing the pawl to assume a more directtransverse position, and thus dog'gin g the tube in the standard andpreventing it from slipping down. To lower the seat, the hands areapplied thereto `as above described; but instead ot lifting on the seat,as aforesaid for raising it, the plate is simply pressed against theunder side, the result of which will be to draw on the rear end ot' thepawl and disengage its point from the rack, thereby leaving the tubeyfree to slide down into the standard.

To assist in holding the pawl lirmly in position, and to canse it to actimmediately in its engagement with the. rack, is the purpose ot' thespring J, which, as will be seen, is attached tothe rear end ot' thepawl, the tension of which keeps it in engagement with the ruck, asshown.

The special advantage of a seat being raised in the manner as abovedescribed over the usual method, viz., a screw, is, that the seat cannotrevolve, but remains lirm, which, when used as a music-stool, is amatter of great importance, as the player needs to be securely and rmlyseated, in order to execute well, but which he cannot be. when the seatis screwed into the standard, for the strain of the body upon the seatcauses it to turn more or less, and thereby renders the stool insecureand unsteady.

What I claim as my invention, and desire to secure by Letters Patent,is-

The pawl G, rack H, link I, plate E, and spring J, as arranged incombination with the tube O, standard B, and seat D, in the mannersubstantially as and for the purpose set forth.

' ARNOLD DOLL. Witnesses:

J. H. BURRiDGE, A. F. CORNELL.

